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Expectations, Stability, and Exchange Rate Dynamics under the Post Keynesian Hypothesis

Hiroya Akiba
Journal of Post Keynesian Economics
Vol. 27, No. 1 (Autumn, 2004), pp. 125-139
Published by: Taylor & Francis, Ltd.
Stable URL: http://www.jstor.org/stable/4538913
Page Count: 15
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Expectations, Stability, and Exchange Rate Dynamics under the Post Keynesian Hypothesis
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Abstract

This paper considers the recent empirical support for the Post Keynesian hypothesis on the role of expectations in the foreign exchange market. Our specific interests are whether the model exhibits stability, and whether an overshooting phenomenon is observed. The model is likely to be stable for plausible parameter values, contrary to the conclusion of saddle-point instability in the "sticky price monetary model." Overshooting is possible for expectations for the medium-term horizon, but undershooting is also possible for the short-term horizon. Because the extrapolative expectations are stronger than the regressive expectations, undershooting is likely for the actual exchange rate in the short run.

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